VOGEL-Volute Casing Pumps Model: LSN, LSNI, LSNH, LSNIH

Transcription

1 en VOGEL-Volute Casing Pumps Model: LSN, LSNI, LSNH, LSNIH Installation, Operation and Maintenance Instruction Translation of the Original Operation Manual en Keep for further use! Pay attention to this operating instruction before the delivery, installation, start-up a.s.o.! Artikel Nr Rev /2012

2 Xylem Water Solutions Austria GmbH Ernst Vogel-Straße 2 A-2000 Stockerau Telefon: +43 (0) 2266 / 604 Fax: +43 (0) 2266 / [email protected] Internet:

3 TABLE of CONTENTS Pump Name Plate... 2 ATEX-Label (only for pumps in compliance with EC directive 94/9/EG) General Guarantee Safety Regulations Marking of References in the Operating Instructions Dangers of non-observance of the Safety Instructions Safety Instructions for the Operator / Worker Safety Instructions for Maintenance, Inspections and Mounting Work Unauthorized Alteration and Spare Parts Production Undue Operation Explosion Protection Use acc. to Regulations Description Design Shaft Sealing Bearings Approximate Value for Sound Pressure Level Permitted Nozzle Loads and Torques at the Pump Nozzles Transport, Handling, Storage Transport, Handling Storage / Conservation Mounting / Installation Mounting of Pump / Unit Connection of Pipings to the Pump Coupling Drive Electric Connection Final Control Start-up, Operation, Shut down Initial start-up Switch on drive Restarting Limits of Operation Lubrication of Bearings Monitoring Shutting down Storage / longer periods of non-operation Servicing, Maintenance General remarks Mechanical seals Stuffing boxes Lubrication and Change of Lubricant Coupling Cleaning of pump Dismantling and repair of pump General remarks General Disassembly of Back Pull Out Assembly Removal of Impeller Removal of Shaft Sealing Removal of Bearing Reconditioning Mounting Recommended Spare Parts, Spare Pumps Spare Parts Stand-by pumps Faults - Causes and Solutions LSN 100-english page 1 Revision 01

4 Pump Name Plate Type *) Type of pump S/N *) Serial number Year Year of construction Q Rated capacity at the operating point P Rated power at the operating point H Head (Energy head) at the operating point n Speed p all w C Max. permitted casing-operation-pressure (=highest discharge pressure at the rated operating temperature to which the pump casing can be used). t max op Maximum permitted operating temperature of pumped liquid Item No Customer related order number Imp Outer diameter of the impeller *) All details of design and materials are defined with this information. They must be stated on all inquiries to the manufacturer resp. orders of spare. ATEX-Label (only for pumps in compliance with EC directive 94/9/EG) CE Marking of compliance with the EC directive 94/9/EG Ex specific marking for explosion protection II Symbol for the appliance group 2G Symbol for the category (2), explosive atmosphere due to gases, vapors or mist (G) c Symbol for used ignition protection (constructual safety "c") T1-T. Symbol for classification of the theoretically available range of the temperature classes - data for temperature class refer to chapter 2.7.5; Data for maximum permitted temperature of pumped liquid refer to pump name plate, data sheet and / or order confirmation. The conformity with the EC directive 94/9/EG "Appliances and Protection Systems for designated use in areas endangered to explosion" is declared by the issue of the EC-Declaration of Conformity and the attachment of the ATEX-label at the pump (bearing bracket). The ATEX-label is attached additionally to the pump name plate. LSN 100-english page 2 Revision 01

5 1. General This product corresponds with the requirements of the Machine directive 2006/42/EG. The staff employed on installation, operation, inspection and maintenance must be able to prove that they know about the relevant accident prevention regulations and that they are suitably qualified for this work. If the staff does not have the relevant knowledge, they should be provided with suitable instruction. The operation safety of the delivered pump resp. unit (= pump with motor) can only be guaranteed on designated use according to the attached data sheet and / or order confirmation resp. chapter 6 "Start-up, Operation, Shut down". The operator is responsible for following the instructions and complying with the safety requirements given in these Operating Instructions. Smooth operation of the pump or pump unit can only be achieved if installation and maintenance are carried out carefully in accordance with the rules generally applied in the field of engineering and electrical engineering. If not all the information can be found in these Operating Instructions, please contact us. The manufacturer takes no responsibility for the pump or pump unit if the Operating Instructions are not followed. These Operating Instructions should be kept in a safe place for future use. If this pump or pump unit is handed on to any third party, it is essential that these Operating Instructions and the operating conditions and working limits given in the Confirmation of Order are also passed on in full. These Operating Instructions do not take into account all design details and variants nor all the possible chance occurrences and events which might happen during installation, operation and maintenance. We retain all copyright in these Operating Instructions; they are intended only for personal use by the owner of the pump or the pump unit. The Operating Instructions contain technical instructions and drawings which may not, as a whole or in part, be reproduced, distributed or used in any unauthorised way for competitive purposes or passed on to others. 1.1 Guarantee The guarantee is given in accordance with our Conditions of Delivery and/or the confirmation of order. Repair work during the guarantee period may only be carried out by us, or subject to our written approval. Otherwise the guarantee ceases to apply. Longer-term guarantees basically only cover correct handling and use of the specified material. The guarantee shall not cover natural wear and tear and all parts subject to wear, such as impellers, shaft sealings, shafts, shaft sleeves, bearings, wear rings etc. or damage caused by transport or improper handling. In order for the guarantee to apply, it is essential that the pump or pump unit is used in accordance with the operating conditions given on the name plate, confirmation of order and in the data sheet. This applies particularly for the endurance of the materials and smooth running of the pump and shaft sealing. If one or more aspects of the actual operating conditions are different, we should be asked to confirm in writing that the pump is suitable. 2. Safety Regulations These Operating Instructions contain important instructions which must be followed when the pump is assembled and commissioned and during operating and maintenance. For this reason, these Operating Instructions must be read by the skilled staff responsible and/or by the operator of the plant before it is installed and commissioned, and they must be left permanently available at the place where the pump or pump unit is in use. These Operating Instructions do not refer to the General Regulations on Accident Prevention or local safety and/or operating regulations. The operator is responsible for complying with these (if necessary by calling in additional installation staff). Equally, instructions and safety devices regarding handling and disposal of the pumped media and/or auxilliary media for flushing, lubrication a.s.o., especially if they are explosive, toxical, hot a.s.o., are not part of this operating instruction. For the competent and prescribed handling only the operator is responsible. 2.1 Marking of References in the Operating Instructions The safety regulations contained in these Operating Instructions are specially marked with safety signs acc. to nach DIN 4844: Safety reference! Non-observance can impair the pump and its function. EC-Ex Marking Products intended for use in explosive atmospheres must be marked. General Symbol for Danger! Persons can be endangered. Warning of electric voltage! LSN 100-english page 3 Revision 01

6 Safety instructions attached directly to the pump resp. unit must be followed under any circumstances. Further they must be kept in good readable condition. In the same way, as these Operating Instructions of the pump, all possibly attached Operating Instructions of accessories (e.g. motor) must be noticed and kept available. Measures should be taken to exclude any danger from electricity (e.g. by complying with the local regulations on electrical equipment). If work is carried out on live electrical components, they should be unplugged from the mains or the main switch turned off and fuse unscrewed. A motor protection switch is to be provided. 2.2 Dangers of non-observance of the Safety Instructions Non-observance of the Safety Instructions can lead to loss of any claim for damages. Further, non-observance can lead to following risks: Failure of important functions of the machine or facility. Failure of electronic appliances and measuring instruments by magnetic fields. Endangering of persons and their personal property by magnetic fields. Endangering of persons by electric, mechanic and chemical influences. Endangering of environment through leakage of dangerous substances. On application of the unit in areas endangered to explosion special attention must be paid to sections marked with Ex. 2.3 Safety Instructions for the Operator / Worker Depending on the operating conditions, wear and tear, corrosion or age will limit the working life of the pump/pump unit, and its specified characteristics. The operator must ensure that regular inspection and maintenance are carried out so that all parts are replaced in good time, which would otherwise endanger the safe operation of the system. If abnormal operation or any damage are observed, the pump must cease operation immediately. If the breakdown or failure of any system or unit could lead to people being hurt or property being damaged, such system or unit must be provided with alarm devices and/or spare modules, and they should be tested regularly to ensure that they function properly. If there is any risk of injury from hot or cold machine parts, these parts must be protected against contact by the user, or suitable warning signs must be affixed. Contact protection on moving parts (e.g. coupling guards) must not be removed from systems that are in operation. If the sound level of a pump or pump unit is above 85 db(a) an ear protection has to be used when staying near the pump for some time. If dangerous media (e.g. explosive, toxic, hot) leak out (e.g. from shaft seals), these must be directed away so that there is no danger to people or the environment. The provisions of the law must be observed. 2.4 Safety Instructions for Maintenance, Inspections and Mounting Work The operator is responsible that any maintenance, inspections and mounting work is made by authorized competent personnel, which must be informed by havingng read the Operating Instructions. Basically, all work on the pump or pump unit should only be carried out when the pump is stationary and not under pressure. All parts must be allowed to return to ambient temperature. Make sure that no-one can start the motor during such work. It is essential that the procedure for stopping the system described in the Operating Instructions is observed. Pumps or pump systems that carry media that are dangerous to health must be decontaminated before being taken apart. Safety Data Sheets for the various liquids handled. Immediately after finishing work, all safety and protective devices must be replaced or restarted. 2.5 Unauthorized Alteration and Spare Parts Production Alteration or changes of the machine are permitted after agreement with the manufacturer. Original spare parts and accessory authorized by the manufacturer are serving the safety. The use of other parts can lead to loss of liability for therefrom resulting consequences. 2.6 Undue Operation The operating safety of the delivered machine can only be guaranteed by designated use acc. to the following chapters of the Operating Instructions. The limits stated in the data sheet and / or order confirmation must not be exceeded under any circumstances. 2.7 Explosion Protection On application of units in areas endangered to explosion measures and references in the chapters to must be observed, so that explosion protection is guaranteed Filling of unit During operation of the pump the system of the suction and pressure pipe and the pump itself must permanently be filled with the pumped liquid. Thus, no explosive atmosphere can develop and the danger of dry-run is avoided. LSN 100-english page 4 Revision 01

7 If the operator can t guarantee that, according monitoring measures must be provided. Equally all seal casings, auxiliary systems of the shaft sealing, as well as heating and cooling systems must be filled carefully Marking The marking of the pump refers to the pump itself. For coupling and motor resp. further additions a separate Declaration of Conformity, as well as a corresponding marking must be available. Example of of marking at pump: CE Ex II 2 G c T.... The marking shows the theoretically applicable range of temperature classes. The different temperatures, permitted acc. to pump design, result as shown in chapter The same is valid for the drive. For a whole unit (pump, coupling, motor) with different temperature classes the lowest is valid Rotation Control Carry out rotation control with speparated coupling halves only! Refer to chapter 5.5 and 6.1 as well. If danger of explosion is also existing during installation, the rotation control must not be carried out by short start-up of the empty pump, to avoid undue temperature increase in case of contact of rotating and stationary parts Operation of pump The pump must only be started up with fully opened suction side and slightly opened pressure side valve. The start-up against closed non-return valve, however, is possible. Immediately after the start-up the discharge side valve must be adjusted to the operating point. Refer to chapter 6.2, as well. Operation with closed valve in suction and / or discharge pipe is not permitted! There s a danger, that high surface temperatures are developing at the pump casing after relatively short time, through fast heating of the liquid inside the pump. Fast pressure increase inside the pump can lead to overload and, thus, the pump can burst. In chapter the minimum flow is stated. Longer operating phases with these flows and the named liquids don t cause additional increase of surface temperature at the pump. Furthermore the references in chapter 6 of these operating Instructions must be taken into consideration. On pumps with mech. seals the permitted temperature limits can be exceeded due to dryrun. Dry run not only can occur on insufficiently filled seal casing, but also because of too much gas in the medium. Operation of the pump out of the permitted operating range can lead to dry-run, as well Temperature Limits Under normal operating conditions the highest temperatures must be expected at the surface of the pump casing and in the area of the bearings. The surface temperature occurring at pump casing corresponds with the temperature of the pumped liquid. If the pump is heated (e. g. heating jacket), care must be taken, that the temperature classes, prescribed for the plant are observed. In the area of the bearing bracket free contact from surface to surrounding must be given. During operation of the pump it must be secured that an overabundant sedimentation of dust is avoided (regular cleaning), to prevent heating of pump surface over the permitted temperature. The operator of the plant must secure that the defined operating temperature is observed. The max. allowed temperature of the pumped liquid at suction depends on the particular temperature class. The following table shows the theoretical temperature limits of the pumped liquid in consideration of the temperature classes acc. to EN Temperature class acc. EN Temperature limit of pumped liquid T4 (135 C) 135 C T3 (200 C) 180 C T2 (300 C) 180 C T1 (450 C) 180 C The particular allowed operating temperature of the pump is shown in the data sheet and / or the order confirmation resp. the type plate at the pump. In the area of the bearings the temperature class T4 is guaranteed, provided that the ambient temperature is 40 C and the appliance is duly operated and maintained Maintenance For a secure and reliable operation it must be secured by regular inspections, that the unit is maintained competently and is kept in good technical condition. LSN 100-english page 5 Revision 01

8 Example: Function of bearings. Operation and application conditions are essentially responsible for their achievable life cycle. By regular control of the lubricant and the running sound the danger of occurring over temperatures by bearings running hot or defect bearing seals is avoided. Refer to chapter 6.6 and 7.4. The function of the shaft sealing must be secured by regular control. If auxiliary systems (e.g. external flushing, cooling, heating) are installiert, it must be checked, if monitoring devices are necessary to secure the function Electric switches and control device, Instrumentation and accessories Electric switches and control devices, instrumentation and accessories like e.g. flush tanks, a.s.o., must correspond with the valid safety requirements and regulations for explosion protection. 2.8 Use acc. to Regulations Speed, Pressure, Temperature Suitable safety measures must be taken at the plant to ensure that the speed, pressure and temperature of the pump and the shaft sealing do not exceed the limit values given in the data sheet and / or order confirmation. The given admission pressures (system pressures) must also be sufficiently high. Further, pressure shocks, as can occur on too fast shut down of the facility, must be kept away from the pump (e.g. by non-return valve at pressure side, fly wheel, airtanks). Quick temperature changes must be avoided. They could cause a temperature shock and lead to damage or impair the function of single components NPSH The pumped liquid must have a min. pressure NPSH at the impeller inlet, so that cavitation free work is secured resp. a "break off" of the pump flow is prevented. This condition is fulfilled, when NPSH-value of the system (NPSHA) lies above NPSH-value of the pump (NPSHR) under all operating conditions. Attentention must especially be piad to the NPSHvalue on pumping liquids near the vapour pressure. If the NPSH-value of the pump remains under, this can lead from damage of the material due to cavitation to destruction by overheating. The NPSH-value of the pump (NPSHR) is shown in the curves of every pump type Sealing, Flushing, Cooling Suitable provisions for the regulation and monitoring of sealing, flushing or cooling are to be provided. When handling dangerous liquids or if temperatures are high, care should be taken to ensure that the pump ceases operating if the sealing, flushing or cooling system fails. Sealing, flushing and cooling systems must always be operational before the pump is started up. They should not be taken out of operation until the pump has stopped, provided that the nature of the operation allows this at all Back Flow In systems where pumps are operating in closed circuits under pressure (gas cushions, steam pressure), the pressure of the gas cushion must not be reduced via the pump, since the back flow speed may be much higher than the operating speed, which would destroy the unit Permitted Nozzle Loads and Torques Basically the suction and discharge piping must be designed in such way, that as little forces as possible are effective to the pump. If that is not possible, the values shown in chapter 3.5 must not be exceeded under any circumstances. This is valid for the operation as well as for the standstill of the pump and therefore for all possible pressures and temperatures of the unit. 3. Description 3.1 Design LSN-pumps are single-stage volute casing pumps in process design. Hydraulic design and dimensions comply with ISO 2858/ EN 22858, the technical design complies with ISO 5199/EN LSNI-pumps as design LSN, except that they have an inducer. LSNH- and LSNIH-pumps pumps additionally possess a cooling or heating of the casing cover and/or the volute casing. LSN 100-english page 6 Revision 01

9 The pumps are designed as modular systems and can, therefore, be delivered in many variants (e.g. different materials, shaft sealings, different kinds of lubrication, cooling / heating, a.s.o.). The permitted application conditions and design details of the delivered pump are shown in the attached data sheet and / or order confirmation. 3.2 Shaft Sealing Basically there are two kinds of shaft sealing: the paccking and the mechanical seal, whereas, there again are many variants of both kinds. At the data sheet and / or the order confirmation the shaft sealing type of your pump is shown. An instruction for the packing of a stuffing box resp. for the mounting and operation of mech. seals can be found in the appendix of the particular "Mounting Instructions of the Shaft Sealing". Further details about packings and mech. seals, as well as the therewith connected accidental dangers, you can find in chapter 6.6 and in chapters 7.2 and 7.3. In areas endangered to explosion the use of pumps with packings is forbidden! 3.3 Bearings The pump shaft is guided by antifriction bearings. In the data sheet and / or order confirmation you can see, if your pump is designed for oil lubrication (standard design) or grease lubrication (special design). In areas endangered to explosion the use of pumps with grease lubricated bearings is forbidden! Used bearings The size of the bearing bracket of your pump is shown in the data sheet and / or order confirmation. Bearing bracket Bearing type pump side drive side C3 3307A - C C3 3309A - C C3 3311A - C C3 3313A - C3 3.4 Approximate Value for Sound Pressure Level Nominal power P N in kw Sound pressure level L pa in db(a) Pump alone Pump + Motor 2950 min min min min min min ,55 50,5 49,5 49,0 58,0 52,0 51,5 0,75 52,0 51,0 50,5 59,0 54,0 53,0 1,1 54,0 53,0 52,5 60,0 55,5 54,5 1,5 55,5 55,0 54,5 63,5 57,0 56,0 2,2 58,0 57,0 56,5 64,5 59,0 58,5 3,0 59,5 58,5 58,0 68,5 61,0 62,0 4,0 61,0 60,0 59,5 69,0 63,0 63,0 5,5 63,0 62,0 61,5 70,0 65,0 65,0 7,5 64,5 63,5 63,0 70,5 67,0 67,0 11,0 66,5 65,5 65,0 72,0 69,0 68,5 15,0 68,0 67,0 66,5 72,5 70,0 70,5 18,5 69,0 68,5 68,0 73,0 70,5 74,0 22,0 70,5 69,5 69,0 74,5 71,0 74,0 30,0 72,0 71,0 70,5 75,0 72,0 73,0 37,0 73,0 72,0 71,5 76,0 73,5 73,5 45,0 74,0 73,0 72,5 77,0 74,5 73,5 55,0 75,5 74,5 74,0 78,0 75,5 75,0 75,0 77,0 76,0 75,5 80,0 76,5 76,0 90,0 78,0 77, ,5 77, ,0 79,0 78, ,5 78, ,0 80,0 79, ,0 79, ,0 81,0 80, ,5 80,5 -- Sound pressure level L pa measured in 1 m distance from pump surface acc. to DIN 45635, part 1 and 24. Room and foundation influences are not considered. The tolerance for these values is ±3 db(a). Addition with 60 Hz-operation: Pump alone: Pump with motor: +4 db(a) 3.5 Permitted Nozzle Loads and Torques at the Pump Nozzles following the Europump-Recommendation for pump acc. to ISO The data for forces and torques are only valid for static piping loads. The values given in the chart are valid for pump units with standard-lsn-base frames (ungrouted). All values for forces and torques refer to standard materials EN-GJS400-18LT and Oil Sump Cooling On temperatures of the pumped liquid over 160 C an oil sump cooling is required. For connection refer to list "Connections" in the annex. For cooling use pure, non-aggressive water with a maximum incomming temperature of 30 C. Cooling water should be hand-warm at discharge. The pressure in the cooling system must not exceed max. 6 bar. Provide control devices for temperature and pressure monitoring. pic 1 LSN 100-english page 7 Revision 01

10 Suction nozzle Discharge nozzle Sizes Forces in N Torques in Nm Forces in N Torques in Nm DN DN Fx Fy Fz F Mx My Mz M Fx Fy Fz F Mx My Mz M Transport, Handling, Storage 4.1 Transport, Handling Check the pump / pump unit immediately upon delivery / receipt of despatch for damage or missing parts. The pump / pump unit must be transported carefully and by competent personnel. Avoid serious impacts. Keep the pump/pump unit in the same position in which it was supplied from the factory. Take note of the instructions on the packaging. The suction and discharge side of the pump must be closed with plugs during transport and storage. Dispose of all packing materials in accordance with local regulations. Lifting devices (e.g. fork-lift truck, crane, crane device, pulleys, sling ropes, etc.) must be sufficiently strong and must only be used by authorized persons. The weight of the pump / pump unit is given in the data sheet. The pump / pump unit may only be lifted by solid points such as the casing, flanges or frame. Picture 2 shows the correct method of carrying by crane. pic 2 Do not stand underneath suspended loads. Take note of the general regulations on prevention of accidents. The pump / pump unit must be secured against tipping over and slipping until it has been fixed in its final location. Sling ropes must not be fixed to ends of shafts or the ring loops of the motor. Slipping out of the pump / pump unit of the transport lifting device can cause damages to persons and things. LSN 100-english page 8 Revision 01

11 4.2 Storage / Conservation Pumps or units, which are stored over a longer period before start-up (max. 6 months), must be protected from moisture, vibrations and dirt (e.g. by wrapping in oil paper or plastic). Pumps must basically be stored in a place where they are protected from the weather, e.g. under dry cover. During this time, all suction and discharge branches and all other intakes and outlets must be closed with dummy flanges or plugs. For longer periods of storage conservation measurements at machined surfaces and packing with moisture protection can be necessary! 5. Mounting / Installation 5.1 Mounting of Pump / Unit Mounting of pump on a base frame The pump and motor (= pump unit) must be provided with a base frame made of steel or cast iron or a fabricated (welded) frame, where this does not exist already or if it is not included in the delivery. This base frame must be placed on a foundation which can withstand all loads that arise during operation (refer to chapter 5.1.2). When mounting the pump onto the base frame the following must to be noticed: The base frame must be solid, so that there won t occur any twists or vibrations during the operation. The mounting surfaces of the pump feet and motor on the base frame must be flat (machining is recommended). Bracing of the pump leads to premature breakdown of the pump and to a loss of warranty. The drillings for the pump mounting must be in such a way, that safe fastening is guaranteed. Between pump and motor shaft an adequate space must be left depending on the used coupling, refer to chapter 5.3. Between pump and base frame there must be an adequate shimming, so that in the case of replacement of the pump the equal height between bottom and centerline can be adjusted (recommended vertical adjustment 4 to 6 mm). Align pump and motor, refer to chapter 5.3, as well Mounting the unit to a foundation The place, where the pump is mounted must be prepared acc. to the dimensions of the dimensional drawings. The concrete foundations should have sufficient firmness acc. to DIN 1045 or equal standard (min. BN 15), to ensure a secure, functional mounting. The concrete foundation must have set, before the unit is errected. Ist surface must be horizontal and even. Sufficient space must be provided for maintenance and repair work, especially for replacing the drive motor or the complete pump unit. The motor fan must be able to take in enough cool air, and the intake grille must therefore be at least 10 cm away from any wall, etc. For the set of anchor bolts according recesses must be provided. If that is not the case, concrete expansion bolts resp. epoxy capsle anchor bolts can be used. When mounting the pump on the foundation it must be adjusted at the discharge nozzle by means of a spirit-level (at discharge nozzle). The permitted deviation is 0,2 mm/m. After inserting the foundation bolts they must be cast in the foundation with concrete. After setting of the grout the coupling alignment must be checked according chapter and possible misalignments must be corrected by adjusting foundation frame in the area of the drive motor. The smoothness of the base frame must be 0,2 mm/m before it is filled up resp. fastened. For adjustment leveling shims or leveling screws (optional, not delivered standardwise) can be used. Levelling shims must be inserted next to the foundation anchors and must lie plainly. After that fasten foundation bolts symmetrically but only slightly. Fill in base frame with non shrinking grout. Notice: Avoid air bubbles (e.g. by vibrating). Check that the grout has properly set and hardened. Take care for the after-treatment of the concrete acc. to DIN After setting, tighten the foundation anchor evenly and firmly. Check alignment of coupling acc. to chapter and re-adjust, if necessary. Further, check that all screws between pump / motor and the base frame fit snugly. Although the original LSN-base frames are designed solidly, the filling in of the adjusted base frame up to the rim is recommended. If vibrations are transmitted to the foundation from adjoining components, it must be guarded through adequate vibration damping paddings (vibrations from outside can impair the bearing). To prevent vibrations being transmitted to adjoining components, the foundation should be laid on a suitable insulating base. The size of these insulating pads will vary, depending on circumstances, and should therefore be determined by an experienced specialist. 5.2 Connection of Pipings to the Pump The pump must not be used as fixed point for the piping. The permitted piping loads must not be exceeded, refer to chapter 3.5. LSN 100-english page 9 Revision 01

12 5.2.1 Suction and discharge pipe The pipes must be of a size and design that liquid can flow freely into the pump and that the pump functions without problems. Particular attention is to be paid to ensuring that suction pipes are airtight and that the NPSH values are observed. Under suction lift condition lay the suction pipe in the horizontal section towards the pump so that it is slightly inclined upwards so that no air traps occur. Under positive suction head condition install the suction pipe work slightly declined towards the pump. Do not install fittings or elbows right before the suction nozzle. If the suction supply is under vacuum and entrained gas may be present in the liquid, it is recommended that a vent line be considered upstream of the pump suction with return to the suction supply, above the max liquid level. An additional flushed piping - discharge branchvent line - makes it easier to de-aerate the pump before start-up (pic 3). When emptying the pipe after the pressure test, make sure that the pump is treated properly (danger of rust and problems when starting up). In the case of pumps with stuffing boxes, replace packing after pressure test (packing may be overcompressed and thus no longer suitable for use) Additional connections Any required sealing, flushing or cooling pipe connections must be installed. Please consult the data sheet to see which pipes, pressures and amounts are necessary. The position and size of connections to the pump are given in the appendix, "Connections". These connections are essential for the function! It is recommended that a pipeline is installed to take off any leakage from the shaft seal. For connection, see appendix, "Connections". 5.3 Coupling Make sure that nobody can start the motor during work on the coupling. According to Accident Prevention Regulations, the pump unit may only be operated when the coupling guard is mounted. On operation in zone 1 and 2 a coupling with valid Atex-certification must be used. The Operating Instructions of the manufacturer must be followed. pic 3 When laying the pipes, make sure that the pump is accessible for maintenance, installation and disassembly. Notice "Permitted Forces on Flanges" (chapter 3.5). If expansion joints are used in the pipes, they have to be supported in such a way that the pump is not loaded unduely high because of the pressure in the pipes. Before connecting up to pump: remove protective coverings from suction and discharge branches. Before starting up, the pipe system, fittings and equipment must be cleaned to remove weld spatter, scale etc. Any pollutants are to be completely removed from pump units that are directly or indirectly connected to drinking water systems before being installed and taken into use. To protect the shaft sealing (especially mechanical seals) against foreign impurities, it is recommended that a sieve, 800 micron, is installed in the suction/intake pipe when the motor is being started up. If the pipe system is tested with the pump installed, do not exceed the maximum permitted casing pressure of the pump and/or shaft sealing (see data sheet) Alignment of coupling The alignment of the coupling must be carried out with the utmost care and attention, so that the unit will operate without failure. If you do not pay attention to this hint you will lose your warranty! After mounting onto the foundation and the connection of the pipings the coupling must be adjusted again, even, if the unit was delivered completely mounted on the frame. Before starting installation, carefully clean shaft ends and coupling components. Before adjusting the coupling unfasten screws (901.12) between bearing bracket (330) and casing foot (183) and only fasten again after the adjustment. Repeat measurement after fastening of screws (901.12). The unit is properly aligned, when a ruler, which is laid axially over both coupling halves, has the same distance to the particular shaft everywhere on the circumference. Further, both coupling halves must have the same distance to one another on every of the circumference. This must be checked by means of a tracer, gauge or dial gage; refer to pic. 4 and 5. The permitted tolerances for your coupling is shown in the operating instructions of the LSN 100-english page 10 Revision 01

13 coupling. For the exact characterization of your coupling refer to data sheet and / or order confirmation. Assembly: ruler gauge pic 4 - Alignment of coupling with gauge and ruler ruler gauge pic 5 - Alignment of coupling with spacer Control alignment of coupling again in operation warm condition and on system pressure (if available) and correct, if necessary. Pay attention to chapter 6 beforehand! It must be possible to turn the unit easily and harmoniously by hand. Improper alignment of the unit can lead to damages at coupling and unit! Mount coupling guard after alignment and before start-up Coupling Guard Parts: Acc. to accident prevention regulations the pump must only be operated with coupling guard. Care has to be taken, that the used coupling guard consits of non-sparking material. 5.4 Drive On selecting the motor size care has to be taken, that the requirements acc. to ISO 5199 are fulfilled. Note the Operating Instructions of the motor manufacturer. On application in zone 1 and 2 a motor with valid Atex-certification must be used. LSN 100-english page 11 Revision 01

14 5.5 Electric Connection Electrical connection work may only be carried out by an authorised professional. The rules and regulations valid for electrical technology, especially those concerned with safety measures, must be observed. The regulations of the national power supply companies operating in that area must also be observed. Before starting work, check that the information on the motor name plate is the same as the local mains network. The power supply cable of the coupled drive motor must be connected up in accordance with the wiring diagram produced by the motor manufacturer. A protective motor switch must be provided. In areas endangered to explosion IEC must additionally be noticed for the electric installation. Care must be taken that the base frame (2x M10-thread available for earthing screws) is earthed by means of corresponding measures. The direction of rotation must only be checked when the pump is full. Dry running will cause damage to the pump. 5.6 Final Control Check alignment of coupling acc. to chapter again. It must be possible to turn the unit easily by hand at the coupling. 6. Start-up, Operation, Shut down The plant may only be started up by people who are familiar with the local safety regulations and with these Operating Instructions (especially with the safety regulations and safety instructions given here). 6.1 Initial start-up Before starting up the pump, check, if the following points were controlled and carried out: If pump is oil lubricated, first open oil drain (GD) and drain off any liquid that may have collected (e.g. condensation). Close oil drain (GD) and fill oil as described in chapter For pumps with grease lubrication, no further lubrication is needed before initial start-up. Pump and suction pipe must be filled completely with liquid when starting up. Turn pump unit once again by hand and check that it moves smoothly and evenly. Check that coupling guard is installed and that all safety devices are operational. Switch on any sealing, flushing or cooling devices that are provided. See data sheet for quantity and pressure. Open valve in suction /intake pipe. Set discharge side valve to approx. 25% of rated flow quantity. With pumps with a discharge branch rated width less than 200, the valve can remain closed when starting up. Secure, that unit is electrically connected acc. to all regulations and with all safety devices. Check direction of rotation by switching on and off briefly. It must be the same as the directional arrow on the bearing frame. 6.2 Switch on drive Immediately (max. 10 seconds on 50 Hz resp. max. 7 seconds on 60 Hz currency feed) after reaching normal operating speed open discharge valve adjust the required operating point. The pumping data shown at the type plate resp. in the data sheet and / or the order confirmation must be met. Every change is only permitted after talking with the manufacturer! Operation with closed valve in the suction and / or discharge piping is not permitted. On starting-up without back-pressure, the backpressure must be produced through throttling at the discharge side. After reaching full backpressure open valve In order that the shaft sealing can be monitored and maintained unhindered, no protection cover is provided in this area. Therefore special attention is required when pump is working (no long hair, loose clothes, a.s.o.). Packing: Packings need leakage for troublefree function (dropwise outlet of pumped medium). Adjust ample leakage in the beginning. Reduce that slowly during the first operating hours by continuously fastening of gland (see position "452" and "920.31" in sectional drawing) when pump is running. Assume drops / minute as approx. value. Dry running packings harden and destroy the shaft sealing resp. the shaft. If pump does not reach attended head or if atypical sounds or vibrations do occur: Switch off pump (see chapter 6.7) and seek for causes (see chapter 10). 6.3 Restarting Basically, the same procedure should be followed as for starting up for the first time. However, there is no need to check the direction of rotation and the accessibility of the pump unit. The pump should only be automatically restarted if it has been made sure that the pump has remained filled whilst stand by. LSN 100-english page 12 Revision 01

15 Be particularly careful not to touch hot machine parts and when working in the unprotected shaft seal area. Remember that automatically controlled systems may switch themselves on suddenly at any time. Suitable warning signs should be affixed. 6.4 Limits of Operation The operating limits of the pump / unit regarding pressure, temperature, performance and speed are shown in the data sheet and / or order confirmation and must be observed under any circumstances! Do not exceed the output given on the motor name plate. Avoid sudden changes in temperature (temperature shocks). The pump and motor should run evenly and without vibrations; check at least once a week Flow min. / max. If no other data are given in the curves or data sheets, the following is valid: Q min = 0,1 x Q BEP for for short time operation Q min = 0,3 x Q BEP for continuous operation Q max = 1,2 x Q BEP for continuous operation *) Q BEP = Flow in efficiency optimum *) on condition that NPSH facility > (NPSH pump + 0,5 m) Abrasive Media On pumping liquids with abrasive components an increased wear at hydraulic and shaft sealing must be expected. The intervals of inspection should be reduced compared to the usual times Permitted number of starts The permitted number of starts of the pump must not be exceeded, see diagram ,0 6.5 Lubrication of Bearings Oil lubrication The bearing bracket must be filled up with oil. For quality of oil refer to chapter For qantity of oil refer to chapter The pumps are delivered without oil filling! Oil level sight glass (standard design) Remove oil filling plug (637) and fill oil into the connection opening (GF1). Fill in oil up to the middle of the oil level sight glass (642) (pic 7). Keep level exactly. Overfilling leads to increased bearing temperature and possibly oil leakage. If oil level is too low this can cause shortcoming of lubrication. pic 7 Constant level oiler (special design) Supplied loose. Unscrew the reservoir from the main body (right threaded) and set aside. Seal the main body into the bearing bracket (330), through a PTFE sealing tape, at connection for constant level oiler (638). Tighten until threaded boss is in vertical position (picture 8). Remove the oil filling plug (637) (upper side of bearing bracket) and fill in oil through the connection opening (GF1), until the oil level reaches almost the middle of the oil level sight glass in the main body. Using a funnel, fill the reservoir (picture 8). Make sure that o-ring is on reservoir spout. Place thumb over reservoir spout, invert, and insert the spout into the internal threaded boss on the main body. Tighten reservoir (picture 8). Now the oil is flowing from the reservoir into the bearing chamber. Repeat filling till the reservoir stays full to 2/3 rd. Refill oil as soon as the oil level falls below 1/3 rd. max. perm. starts/h 10,0 pic 8 1, Motor power [kw] diagram 6 With electric motors, the permitted number of starts is given in the attached motor operating instructions. If two different figures are given, the lower figure is valid Grease lubrication For quality of grease refer to chapter For quantity of grease refer to chapter The bearings are already filled with lithium based grease at the factory and are thus ready for use. The grease provided is suitable for a temperature range from -30 to +90 C (measured at surface of bearing bracket). LSN 100-english page 13 Revision 01

16 Re-lubrication via the two grease nipples (636). Bearing temperature (measured at bearing bracket) should lie max. 50 C over ambient temperature and must not exceed 90 C, control weekly at least. On grease lubrication the bearing temperature can temporarily be higher by 5-10 C after regreasing, till a possible surplus of grease in the bearings is cut. If the pump also remains under operating conditions (pressure and temperature) when stationary, leave all sealing, flushing and cooling systems switched on. The shaft sealing must remain sealed if there is a risk of air being sucked in (in the event of supply from vacuum systems or parallel operation with shared suction pipe). 6.6 Monitoring In areas endangered to explosion it is recommended to monitor the temperature of the bearings and the vibrations of the bearing bracket. Regular monitoring and maintenance will extend the life of your pump or pump system. Check oil level at least once a week and top up if necessary. Check pump for leaks at least once a week. On packing, check quantity of leakage at least once a week (see chapter 6.2 section "Packing"). Check the regulating and monitoring devices of any sealing, flushing or cooling systems once a week to ensure that they function properly. Outgoing cooling water should be handwarm. With double mechanical seals, monitor pressure and flow rate in mechanical seal area; check at least once a week. Pumps which are exposed to corrosive chemicals or to wear through abrasion must be inspected periodically for corrosion or wear and tear. The first inspection should be carried out after six months. All further inspection intervals should be determined on the basis of the state of the pump. 6.7 Shutting down Close the valve in discharge pipe right before (max. 30 seconds) switching off the motor. This is not necessary if there is a spring-loaded check valve. Switch off motor (make sure it runs down quietly). Close the valve on suction side. Close auxiliary systems. Do not shut down cooling system until pump has cooled down. If there is any risk of freezing, empty pump, cooling areas and pipes completely. 6.8 Storage / longer periods of nonoperation Storage of new pumps If the putting into operation shall happen a longer period after the delivery, we recommend the following measures for the storage of the pump: Store pump at a dry place. Rotate pump by hand at least once a month Measures for longer putting out of operation Pump remains installed and in ready for operation: Test runs of 5 min. duration must be made in regular intervals. The span between the test runs is depending on the plant. However, it should be made once a week, at least Longer periods of non-operation After long stationary periods, packings may have hardened; these must be replaced before start-up. When starting up, follow the instructions for starting up for the first time (see chapter 6)! a) Filled pumps Switch stand-by pumps on and immediately off again once a week. Possibly use as main pump. If the stand-by pump is at operating pressure and temperature, leave all sealing, flushing and cooling systems switched on. Replace oil or grease after 2 years. Stuffing box must be adjusted to maintain lubrication of the packing (e.g. do not over tighten). b) Drained pumps Turn shaft at least 1x week (do not switch on because of dry running). Replace oil or grease after 2 years. 7. Servicing, Maintenance 7.1 General remarks Work should only be carried out on the pump or pump unit when it is not in operation. You must observe chapter 2. Maintenance and servicing work must only be carried out by trained, experienced staff who are familiar with the contents of these Operating Instructions, or by the Manufacturer's own service staff. 7.2 Mechanical seals Before opening the pump, it is essential that you note chapter 2 and chapter 8. LSN 100-english page 14 Revision 01

17 If the liquid being handled leaks out at the mechanical seal, it is damaged and must be replaced. Replacement of the mech. seal according to accompanying "Mounting Instructions for Shaft sealing". 7.3 Stuffing boxes Stuffing boxes require constant maintenance, see chapter 6.2 section "Stuffing box". If the leakage rate can no longer be set correctly, the packing is worn out and must be replaced in good time (increased wear on shaft sleeve). Replacement of stuffing boxes acc. to attached "Mounting Instructions for Shaft Sealing". Because of the risk of accidents, addition of packing to pumps during operation or at operating pressure or temperature is strictly forbidden! 7.4 Lubrication and Change of Lubricant Oil lubrication Temperature at bearing First oil change after... operating hours All further oil changes after... operating hours up to 60 C *) 60 C - 80 C *) 80 C C *) *) at least 1x year In plants endangered to explosion the oil changeing intervals must be kept under any circumstances! Oil changing After the first... operating hours, drain oil (oil drain "GD" with drain plug ) and flush with fresh oil. Clean oil drain plug and close oil drain again. Fill in new oil according to chapter 6.5. If the pump is left idle for a longer time, the oil should be changed after two years. Old oil must be disposed of in accordance with the valid national environmental regulations. Oil quality Name Symbol acc. DIN Kinematic viscosity at 40 C Flash point (acc. to Cleveland) Setting point (Pourpoint) Application temperature *) Lubricating oil CLP46 DIN or HD 20W/20 SAE 46 ±4 mm 2 /s +175 C -15 C higher than permitted bearing temperature *) For ambient temperatures under -10 C an other suitable type of lubrication oil must be used. Request required. Oil quantity Bearing bracket Oil quantity in l 24 0,5 32 1,1 42 1,4 48 1, Grease lubrication Re-greasing Grease lubricated bearings with the possibility of re-greasing must be re-lubricated all 4000 operating hours, but at least 1x year. Clean lubricating nipples (636) first. Quality of grease lubricant corresponding to NLGI GRADE 2 Quantity of re-greasing (approx. value) Bearing bracket bearing at pump bearing at drive side side 24 9g / 10cm 3 14g / 16cm g / 15cm 3 20g / 22cm g / 20cm 3 33g / 35cm g / 26cm 3 42g / 46cm 3 If the pump is left non-operational for a longer time, the grease in the bearings should be changed after 2 years. 7.5 Coupling Check the clearance in the coupling components regularly approx. every 1000 operating hours, but at least 1x year, the radial clearance in the coupling parts must be checked. For couplings with rubber pads the following applies: Unless a clearance in the couplings is necessary, the coupling pads may wear out to approximately ¼ of their usual thickness, before they have to be changed. To measure the clearance in the coupling place a mark on the O.D. of each coupling hub (see following pic). Then fixing one hub, turn the opposite hub as far as possible. Then measure the distance ( S V ) between the marks of the coupling. If this measure exceeds the value given in the chart, the packings must be replaced. They must be replaced in sets. Size S v [mm] 5,0 6,0 7,0 8,0 8,5 8,0 8,0 8,5 9,0 10,0 11,5 10,5 11,5 13,0 If wear is heavy, it must be assumed that the motor is not properly aligned with the pump or that the distance between the coupling sections has changed. Replace worn elements and reinstall or adjust coupling, as described in chapter 5.3. LSN 100-english page 15 Revision 01

18 7.6 Cleaning of pump The pump must not be cleaned with pressurised water - water will get into the bearings. Dirt on the outside of the pump has an adverse effect on transmission of heat. The pump should therefore be cleaned with water at regular intervals (depending on the degree of dirt). Radial-Shaft sealings ( and ) are not completely free from leakage. Impurities could cause leakage at the shaft sealing area of the frame. Therefore wipe off impurities with a rag from time to time. Replace dirty oil level sight glass (642). 8. Dismantling and repair of pump 8.1 General remarks Repair to the pump or pump system may only be carried out by authorised skilled personnel or by the manufacturer s specialist staff. When disassembling the pump pay attention to chapter 2 and chapter 4.1. For mounting and repair you can order specialized personnel if you want. If dangerous liquids are pumped the appropriate disposal of the handled liquid is necessary before the disassembly of the pump. Pay attention to the fact, that even in drained pumps there are remainders of the handled liquid. If necessary the pump must be flushed or decontaminated. Laws must be observed, otherwise danger to health is existing! Before the disassembly the pump has to be secured in such a way, that it can t be started. The pump casing must be drained and without pressure. All locking devices in the suction- and dischargepipe must be closed. All parts must have taken on the temperature of the environment. Secure disassembled pumps, units or single parts against tipping over or rolling off. While disassembling the pump use of an open flame (blowlamp, etc.) only, when there is no danger of setting fire, cause an explosion or cause injurious vapours. Never apply heat to remove the impeller nut. Use of heat may result in severe physical injury and property damage. Use original spare parts only. Pay attention to the right materials and the matching design. Before disassembly check if required parts are ready. Disassemble the pump only so far, as required for the replacement of the repair part. 8.3 Disassembly of Back Pull Out Assembly The Back Pull Out Assembly includes all parts of the pump except the volute casing (102V). As the pumps are constructed for process design the volute casing (102V) can stay on the base frame and in the pipes, unless the volute casing itself must be repaired. Drain volute casing (102V) through the drain plug (912.11). Unscrew pipe unions of all flush- and coolingwater-pipes and drain lubrication oil from bearing bracket (330) via the screwed plug (903.51). Remove coupling guard. Remove spacer of the spacer type coupling. Loosen screws for support foot (183) from the base frame. Hang the Back Pull Out Assembly onto a lifting device, so that it won t sink down or press into the volute casing during the dismounting. Example see picture 9 for lifting recommendations. 8.2 General Works, which require shocks (hammer), must only be performed outside the explosive atmosphere or only non-sparking tools must be used. Carry out disassembly and mounting according to the appropriate sectional drawing. You will only need common tools. pic 9 Loosen hexagen head bolt (901.11) from the casing. Using the jack screws provided (901.42), separate the Back Pull Out Assembly from the casing. LSN 100-english page 16 Revision 01

19 Installation, Operating and Maintenance Instruction 8.4 Removal of Impeller 8.6 Removal of Bearing Note attached "Mounting Instruction for Shaft Sealing". If the impeller has back vanes check the axial clearance "a" between the impeller (230) and casing cover (161) before you continue the dismounting. Refer to sect Loosen impeller nut (922) (right threaded) by fixing the rotor at the coupling end. Draw off the impeller (230) with two screw drivers or pry bars (picture 10). Remove key (940.31). Remove coupling with a coupling puller (picture 12), remove coupling key (940.52). pic 12 Remove the flinger (507) axially by using 2 screw drivers (see pic 13). pic 13 pic 10 Be sure to locate pry bars under impeller vanes to prevent damage to the impeller. For further dismounting the Back Pull Out Assembly should be placed in the vertical position (with vertical shaft, see picture 11). Attention: Precautions should be taken to prevent the Back Pull Out Assembly from tipping! Loosen hexagen head bolt (901.41). Remove the bearing bracket lantern from bearing bracket (330). Dismount circlip (932.51). Therefore you need a snap ring plier acc. to DIN 5256-C. Bearing bracket 24 32, required snap ring plier size 94/C 40 size 94/C 85 Größe 94/C 85 length i (min.) of snap ring plier 200mm 250mm 300mm Remove shaft (210) including anti-friction bearing ( and ) and bearing nut (923.51) from the bearing bracket (330). Remove the bearing nut (923.51). The bearing nut is right hand threaded and self locking. It can be reused 5 times if it is handled appropriately. Remove the anti-friction bearing ( and ) from the shaft (210) using a hydraulic press or a bearing puller. pic Reconditioning 8.5 Removal of Shaft Sealing Before you remove casing cover notice "Mounting Instructions for Shaft Sealing". Unfasten hexagonal nut (902.32) (not available on all pump sizes) and take casing cover (161) out of bearing bracket (344). LSN 100-english Article No page 17 After disassembly all parts must be cleaned and checked for wear carefully. Worn or damaged parts must be replaced by new parts (spare parts). When reassembling the pump it is recommended to replace all seals. All PTFE-sealing elements and graphite sealings are intended for being used only once. Revision 01 Issue 01/2010

20 In most cases it make sense, if damaged absolutely necessary, to renew the mechanical seal and the bearings. Deposits on the impeller (230), in the volute casing (102V) or on the casing cover must be removed Clearance at impeller Suction side of impeller Back vanes of impeller Drive side of impeller Only for pump sizes Nominal diameter D (mm) Radial clearance s (mm) Axial clearance a (mm) new min. 0,15 0,17 0,20 0,22 0,25 max. 0,19 0,22 0,24 0,27 0,30 wear limits 0,78 0,85 0,90 1,05 1,15 new 0,8-1,2 wear limits max. 1,7 When the wear limits has been reached or exceeded, the worn parts must be replaced. For volute casings (102V) with a wear ring (502.11) and cover casings (161) with a wear ring (502.31) there are the following possibilities to restore the correct clearance: a) Renew impeller (230) and wear ring. Then the original measures are restored. b) A customized wear ring (bored to fit) can be supplied to avoid replacement of the impeller. Please contact factory for details. When volute casing (102V) or casing cover (161) without wear ring must be repaired, a wear ring can be installed to renew pump performance. Remachining of the volute casing and /or casing cover is required. Please contact the factory for details and assistance. (210), as well as thread, use a suitable anti-galling compound (e.g. Molykote/Never-Seeze), so that the assembly and the next disassembly will be easier. Anti-galling compound must be compatible with the pumpage. Screws should be tightened, with the following torque: Location Casing screws All other screws Screw torque in Nm Screw Lubricated Dry threads Size threads M M M M M M Before mounting the second bearing on the shaft push in the circlip (932.51) between the two bearings. Before mounting new bearings, warm them up to 80 C in an oil bath or using a bearing heater. If necessary use a tube to force the inner ring onto the shaft by gentle taps with a hammer. Hold the outer ring to avoid vibrations of the balls. When bolting together the bearing bracket (330) with the bearing bracket lantern (344) and the bearing bracket lantern with the volute casing (102V), screws should be positioned in the centre of the drilled holes. Failure to do so could result in improper oil setting. Push the flinger (507) onto the shaft (210) till it rests axially against the shoulder of the shaft. Between flinger (507) and Bearing bracket lantern (344) there must remain a clearance of at least 0,7 mm. If necessary you can use a driver for mounting (see picture 14). 8.8 Mounting Re-assemble the pumps using the reverse order of steps as completed for pump disassembly. However the following observations should be considered: Pay attention to the utmost cleanliness when reassembling the pump. For tight tolerances, e.g. between shaft sleeve (433) and shaft (210) or impeller (230) and shaft pic 14 Do not use excessive force. For mounting of the shaft sealing (packing or mechanical sealing) see separate description "Mounting Instruction of Shaft Sealing" and chapter 8.5. For impellers with back vanes the axial clearance between the back vanes and the casing cover LSN 100-english page 18 Revision 01

21 (161) should be checked after mounting the impeller (230) and tightening the impeller nut (922) (see chapter 8.7.1). After the mounting of the back pull out assembly, and its assembly into the volute casing, turn the shaft and control the free moving of the pump in this way. The shaft sealings will cause slightly resistance when turning, but there must not be any contact between metal parts. Before starting the pump check alignment of the coupling. This can be dropped on pumps with spacer coupling, if pump casing and motor were not disassembled. Before starting the pump do not forget to fill in oil! Before starting the pump do not forget to install and connect all security devices. 9. Recommended Spare Parts, Spare Pumps 9.1 Spare Parts Spare parts should be selected to last for two-years continuous operation. If no other guidelines are applicable, we recommend that you stock the number of parts listed below (in accordance with DIN 24296). Number of pumps (incl. stand-by pumps) /7 8/9 10/+ Spare Parts Number of Spare Parts Impeller % Wear ring % Shaft with key and nuts % Ball Bearing set % Shaft sleeve % Lantern ring % Packing ring % Joints for pump casing sets % other joints sets % Mech. Seals set % Bearing (lantern with bearing bracket, complete with shaft, bearings, aso.) To ensure optimum availability, we recommend that suitable quantities of spare parts are held in stock, especially if these are made from special materials and in the case of mechanical seals, because of the longer delivery times. Spare Parts Order When ordering spare parts, please supply the following information: Type: S/N (Order No.): Part name: Sectional Drawing All the information is given in the data sheet and the relevant sectional drawing. Store spare parts in dry and clean rooms! 9.2 Stand-by pumps It is essential that a sufficient number of standby pumps are kept ready for use in plants where failure of a pump could endanger human life or cause damage to property or high costs. Regular checks should be carried out to ensure that such pumps are always ready for use (see chapter 6.8). Store stand-by pumps according to chapter Faults - Causes and Solutions The following notes on causes of faults and how to repair them are intended as an aid to recognising the problem. The manufacturer's Customer Service Department is available to help repair faults that the operator cannot or does not want to repair. If the operator repairs or changes the pump, the design data on the Data Sheet and chapter 2 of these Operating Instructions should be particularly taken into account. If necessary, the written agreement of the manufacturer must be obtained. LSN 100-english page 19 Revision 01

22 Discharge too low Discharge stops after a time Head too low Head too high Drive mechanism overloaded Pump not running quietly Temperature in pump too high Temperature in shaft sealing too high Temperature at the bearing too high Pump leaking Leakage rate at shaft sealing too high Cause Back-pressure too high check facility for pollution, open discharge valve reduce resistance in discharge pipe (e.g. clean filter if necessary) use larger impeller (note available motor power) Back-pressure too low, discharge too low throttle discharge valve Speed too high reduce speed compare speed of motor with specified pump speed (rating plate) when adjusting speed (frequency transformer) check reference value setting Speed too low increase speed (check available motor power) compare speed of motor with specified pump speed (rating plate) when adjusting speed (frequency transformer) check reference value settings Flow too little increase min. flow (open discharge valve, bypass) Flow too big reduce flow (throttle discharge valve) Impeller diameter too big use smaller impeller Impeller diameter too small use larger impeller (check available motor power) Pump and/or pipes not completely filled with liquid fill vent Pump or suction/intake pipe blocked clean Air pocket in pipeline vent improve course of pipe Suction height too big / NPSH of system too small increase liquid level and admission pressure reduce resistance in the intake/suction pipe (change course and rated width, open shut-off valves, clean filters) Air being sucked in increase liquid level check if suction pipe is vacuum-tight Air being sucked in through shaft sealing clean sealing pipe increase sealing pressure replace shaft sealing Direction of rotation is wrong swap over two phases of power supply (to be done by an electrician) Inner components suffering from wear replace worn parts Density and/or viscosity of liquid handled is too high seek assistance Stuffing box not straight tighten evenly Stuffing box is fastened too tight resp. shaft sealing is worn loosen stuffing box replace packing and/or mechanical seal check sealing, flushing and cooling pipes (pressure) avoid dry running Lines and roughness on shaft or shaft sleeve replace parts Unsuitable packing material use suitable material (check shaft or shaft sleeve for damage beforehand) Deposits on mechanical seal clean replace mechanical seal if necessary if necessary provide additional rinsing or quench Impeller out of balance remove blocks/deposits replace impeller if broken or unevenly worn check shafts to ensure that they are running true Coupling not aligned align pump unit better Coupling distance too small change Forces in pipeline too high (pump unit under strain) change (support pipes, use compensators, etc.) is foundation plate/frame properly cast in place? Too much, too little or the wrong type of lubricant change Electricity supply not right (2-phase running) check voltage of all phases check cable connections and fuses Sealing insufficient tighten screws replace sealing Bearing damaged replace check lubricant and bearing space for pollutants (rinse oil area) Relief fittings insufficient clean relief openings in impeller replace worn parts (impeller, split rings) adjust in line with the system pressure/intake pressure given on ordering System-related vibrations (resonance) seek assistance Solution LSN 100-english page 20 Revision 01